An Logo-animated helicopter can be used to investigate the concepts of variables, and of reflections and y as a function of x on the coordinate grid. The first Logo animation of a helicopter flying ba...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page showing how to find the area and perimeter of a rectangle
from the coordinates of its vertices. The rectangle can be either parallel to the axes o...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page showing how to find the area and perimeter of a square
from the coordinates of its vertices. The square can be either parallel to the axes or rota...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page showing how to find the area and perimeter of a trapezoid
from the coordinates of its vertices. The trapezoid can be either parallel to the axes o...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that show the definition and properties of a square
when applied in coordinate geometry.
The applet has a square, and the user can drag any vertex ...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that show the definition and properties of a rectangle in coordinate geometry.
The applet has a rectangle with draggable vertices. As the user re-s...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that show the definition and properties of a trapezoid in coordinate geometry.
The applet has a trapezoid with draggable vertices. As the user re-s...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that show the definition of a horizontal line in coordinate geometry.
The applet has two points that the user can drag which define a line.
The lin...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that show the definition of a vertical line in coordinate geometry.
The applet has two points that the user can drag which define a line.
The line ...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that demonstrate how to find the perpendicular
distance between a point and a line.
The applet has a line with sliders that adjust its slope and in...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that demonstrate how to find the perpendicular
distance between a point and a line using trigonometry, given the coordinates of the point and the sl...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that show the definition and properties of the bounding box of a polygon or set of points. Also known as the circumscribed rectangle.
The bounding b...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that calculate the area of a triangle using the box method in coordinate geometry.
The applet has a triangle with draggable vertices. As you drag t...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that calculate the area of a triangle using the formula method in coordinate geometry.
The applet has a triangle with draggable vertices. As you dr...More: lessons, discussions, ratings, reviews,...

A quick review of the Cartesian Coordinate system, including formulas for length and slope of a line segment. It also provides and introduction to the graphing applet used in this lab and others.More: lessons, discussions, ratings, reviews,...

In this activity, students investigate the “negative reciprocal” relationship between the slopes of perpendicular lines. The final phase of the activity is appropriate for more advanced students as th...More: lessons, discussions, ratings, reviews,...

This activity encourages students to gain experience with the language of the Cartesian coordinate system. Each of the problems shows two points, z and w. Point z can be dragged, and point w moves in ...More: lessons, discussions, ratings, reviews,...

This activity is an enhancement to an age old activity of students drawing a "dot-to-dot" picture using coordinates on a coordinate plane. In this case, however, students will design a picture of thei...More: lessons, discussions, ratings, reviews,...

This material is based upon work supported by the
National Science Foundation under Grant DUE-0226284.
Any opinions, findings, and conclusions or recommendations
expressed in this material are those of the author(s)
and do not necessarily reflect the views of the
National Science Foundation.